Graphene film as transparent and electrically conducting material

Abstract

A transparent and conductive film comprising at least one network of graphene flakes is described herein. This film may further comprise an interpenetrating network of other nanostructures, a polymer and/or a functionalization agent(s).

1. A film comprising at least one interconnected network of functionalized graphene flakes and a polymer in electrical contact with the interconnected network of functionalized graphene flakes, wherein the film is optically transparent and electrically conductive, and wherein the film has an optical transparency of at least 80% for 550 nm light. 
     
     
       2. The film of  claim 1 , further comprising a second nanostructured material. 
     
     
       3. The film of  claim 2 , wherein the second nanostructured material forms an interpenetrating network with the interconnected network of graphene flakes. 
     
     
       4. The film of  claim 3 , wherein the film has a sheet resistance of less than 2 kObms/sq. 
     
     
       5. The film of  claim 3 , wherein the second nanostructured material comprises carbon nanotubes. 
     
     
       6. The film of  claim 1 , wherein the polymer forms a layer adjacent to the interconnected network of graphene flakes. 
     
     
       7. The film of  claim 1 , wherein the polymer forms a composite with the interconnected network of graphene flakes. 
     
     
       8. The film of  claim 1 , wherein the film has a sheet resistance of less than 2 kOhms/sq. 
     
     
       9. The film of  claim 1 , wherein the polymer forms at least one of a distinct layer adjacent to and a composite with the interconnected network of graphene flakes.